Overheating Issue

Post by **h20_mako** » Sun Jun 21, 2009 5:42 pm

the electric fan thats in front of the radiator is just wired to switch on when the aircon is on which i also find puzzling when its not even related to any needs for the aircon. So i rewired it to be switched on permanently for more cooling.

Linearaudio - As for the aircon radiator/condenser, there is a fan installed with it that blows the warm air to the ground so no worries there.

alex_holden - Yeah i understand that rocks and sand might be kicked up by the wheels but thats the best location to fit it. As its really warm in Singapore. Temperature these days are around 34-36degreeC and really humid also.

MarlyB - symptoms of overheating is when water temp reaches around 80degreeC, car just stalls. after that i could still crank and restart the engine.

Mogwai - Dont think its worth to recon my rad as mine cracked/burst at the top and only weld repaired it. Probably will get a new rad.

Post by **MarkyB** » Sun Jun 21, 2009 6:03 pm

Does the petrol pump do a lot of ticking ( assuming it ticks in normal operation) before the engine will restart?
Also, does this only happen when you are in traffic?

linearaudio · Post by **linearaudio** » Sun Jun 21, 2009 9:39 pm

[quoteMarlyB - symptoms of overheating is when water temp reaches around 80degreeC, car just stalls. after that i could still crank and restart the engine.[/quote]

80 degrees doesn't sound like engine overheating at all to me! If you are having stalling problems, I would suggest fuel evaporation due to ambient temp and/or heat transfer to carb/fuel lines is the more likely to be the problem.

Post by **h20_mako** » Mon Jun 22, 2009 4:58 am

MarkyB - Yes it does tick before every restart. I presume thats normal. Car will only stall when i'm stationary.

Post by **MarkyB** » Mon Jun 22, 2009 8:52 am

It is probably caused by the petrol "boiling" in the fuel pipe and carb.
Some minors are more prone to this than others but it is a well known issue.
Try making a shield like this:http://potteries.mmoc.org.uk/RallyPics/ ... CF8513.jpg
And another to cover the petrol pipe where it goes past the exhaust manifold.
That should sort it out.

Post by **h20_mako** » Tue Jun 23, 2009 1:03 pm

MarkyB - yeah i will try making e shield out. Btw do you recommend putting refrigerant in e radiator to lower e water temp?

I also encounter slight blueish smoke but this happens only when cold start and when parked idling. Any major issues?

Post by **alex_holden** » Tue Jun 23, 2009 1:24 pm

Antifreeze in the coolant does help a little with cooling I believe, because it has wetting agents in it. It also raises the boiling point and inhibits corrosion, so well worth using even if freezing conditions are not an issue.

Post by **MarkyB** » Tue Jun 23, 2009 6:42 pm

The bit of blue smoke that you see on cold start up will probably be due to the valve stem seals which started off as rubber but will look like they were made from coal now

.
If you have to take the head off for some reason then replace them and the valve guides too if you have the time and money.
Otherwise I wouldn't worry.
Let us know how you get on, feedback is always nice (except from sound systems)

Post by **h20_mako** » Thu Jun 25, 2009 3:17 am

thanks guys. will let you guys know..

cheers!